单词 | Cassini division |
释义 | Cassini divisionnoun Cas·si·ni division ka-ˈsē-nē- variants or less commonly Cassini Division astronomy : the dark region between the two brightest rings of Saturn A sequence of smoothly undulating brightness fluctuations is observed in the outer Cassini division within a band located between Cassini division120,000 and 121,900 km from the centre of Saturn. This consensus lasted until 1675, when astronomer Jean Dominique Cassini reported a dark line (now known as the Cassini Division) within the rings, dividing them into two segments—an inner ring and an outer ring. |
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